.\"     $NetBSD: sa_enable.2,v 1.4 2004/03/14 23:05:09 yamt Exp $
.\"
.\" Copyright (c)2004 YAMAMOTO Takashi,
.\" All rights reserved.
.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" ------------------------------------------------------------
.Dd March 14, 2004
.Dt SA_ENABLE 2
.Os
.Sh NAME
.Nm sa_enable
.Nd enable scheduler activation
.\" ------------------------------------------------------------
.Sh LIBRARY
.Lb libc
.\" ------------------------------------------------------------
.Sh SYNOPSIS
.In sa.h
.Ft int
.Fn sa_enable
.\" ------------------------------------------------------------
.Sh DESCRIPTION
.Fn sa_enable
is used to enable scheduler activation.
.Pp
An upcall handler and upcall stacks should be registered with
.Fn sa_register
and
.Fn sa_stacks
beforehand.
.\" ------------------------------------------------------------
.Sh RETURN VALUES
On success,
.Fn sa_enable
will not return to userland in the normal way.
It returns into the upcall hander with an
.Dv SA_UPCALL_NEWPROC
upcall.
Otherwise, a value of \-1 is returned and
.Va errno
is set to indicate the error.
.\" ------------------------------------------------------------
.Sh SEE ALSO
.Xr sa_register 2 ,
.Xr sa_stacks 2 ,
.Xr pthread 3
